Fuel pressure regulator 3 or 3.5 bar?

[TimJM]

I may as well change the fuel pressure regulator this weekend whilst changing everything else but I was ordering the regulator and the part states it is 3.5 bar:
http://www.racetechdirect.co.uk/tvr-car-part-l0171...

I am pretty certain a Cerbera should be 3 bar as that is 43PSI which is the correct pressure for a 4.5 AJP. Why to racetech sell a 3.5 bar one or have I mistaken what the pressure should be in PSI?

[EvoOlli]

The Fuel pressure Regulator on a SpeedSix is the 3.5 bar=50psi version, this is sure.
I don't know which one is mounted on your Cerbera, but the Bosch Number for the Regulator on the Speedsix is 0 280 160 280.
So you can check your exisiting Regulator which version it is.

[TimJM]

I can just make out 280 as the last three digits so I guess this is 3.5 bar, 50PSI.

I was sure the 4.5 Cerbera injectors were rated at 43PSI so will running them at higher pressure matter? I guess not if that is what everyone does.

[Ron Fellows]

TimJM said:

I can just make out 280 as the last three digits so I guess this is 3.5 bar, 50PSI.

I was sure the 4.5 Cerbera injectors were rated at 43PSI so will running them at higher pressure matter? I guess not if that is what everyone does.

Run that bad boy at 43psi dude

[TimJM]

Ron Fellows said:

Run that bad boy at 43psi dude

I have ordered a test gauge so I can see what we have. The regulator isn't changed out so it should be as it was unless the regulator is playing up (which I suspect).

1/8" NPT fuel test gauge is on the way which looking at the Holly NOS details on the fogger kit I should be able to simply screw into the fuel hose that feeds the fuel distribution block that feeds the fogggers.

Here's hoping for high pressure and a buggered regulator as that will be by far the simplest fix on Saturday.

[N7GTX]

This is the spec for the injectors on a 4.2. The pressure is 3 bar.

scotty_d said:
Ajp 4.2 injectors Bosch

Opel part no. 90298954
Found in calibera 16v and verctra

This part number crosses over to Bosch 0 280 150 744. The specs are flow rate of 260cc at 3 bar and resistance of 15.5 ohms.

[TimJM]

N7GTX said:

This is the spec for the injectors on a 4.2. The pressure is 3 bar.

scotty_d said:
Ajp 4.2 injectors Bosch

Opel part no. 90298954
Found in calibera 16v and verctra

This part number crosses over to Bosch 0 280 150 744. The specs are flow rate of 260cc at 3 bar and resistance of 15.5 ohms.

Thanks for that - I will check if the 4.5 is the same as the fuel regulators on a 4.5 seem to be 3.5bar (although I was sure they should be 3 bar too).